Kimchi is a traditional fermented dish from Korea that has been consumed for over a thousand years. It is made by fermenting vegetables such as napa cabbage, radish, scallions, or cucumbers, along with spices, salt, and other ingredients. The origins of kimchi can be traced back to ancient times, when people in Korea used to preserve vegetables by salting them and storing them in earthenware jars. Over time, this process evolved into the fermentation of vegetables with spices, which created a delicious and healthy food. Kimchi was an important part of the Korean diet, particularly during the winter months, when fresh vegetables were scarce. It was also considered a medicinal food, believed to help prevent illness and improve digestion. In the 16th century, kimchi became even more popular in Korea after the introduction of chili peppers, which added a spicy kick to the dish. The use of chili peppers also had health benefits, as it helped to increase circulation and improve digestion.
Traditionally cabbage is kept whole and paste is applied manually between each leaf.
To simplify you can cut cabbage in to smaller pieces and just mix it with paste.
Fermentation time under the room temperature will determine intensity of sourness.